how to submit multiple dropdowns using one button

I am working with Laravel blade. The form has 3 dropdowns, a checkbox, and a date text box. When I submit the form only the date value is retrieved. I know that I must use jQuery for multiple text boxes but I don’t know how to implement it.

<form class="form-group" id="#infoform" method="POST" action="/calender">
  {{csrf_field()}}
  <div class="form-group">
    <div class="card-body">
      <h3 class="card-title">Basic Info</h3>
      <div class="row">
        <div class="col-sm-6">
          <div class="form-group">
            <label> Post Type <small class="text-muted"> Academic calender </small></label>
            <select id="type" class="select form-select shadow-none" style="width: 100%; height: 36px">
              <option value="calender"> Academic calender </option>
            </select>
          </div>
        </div>
      </div>
      <div class="col-sm-6">
        <div class="form-group">
          <label> Publish Date <small class="text-muted"> When the calender will be published </small></label>
          <input type="date" class="form-control" name="publishDate" id="publishDate">
        </div>
      </div>
      <div class="row">
        <div class="col-sm-4">
          <div class="form-group" id="mark">
            <div class="form-check mr-sm-2">
              <input type="checkbox" class="form-check-input" id="Featured-News form-control ">
              <label class="form-check-label mb-0" for="customControlAutosizing1"> <i class="mdi mdi-pin"></i> Mark as Featured Announcements for </label>
            </div>
          </div>
        </div>

        <div class="col-sm-3">
          <div class="form-group" id="duration">
            <select class="select form-select shadow-none">
              <option value="Abu Kir"> 5 day </option>
              <option value="Smart Village"> 10 days </option>
              <option value="Elalamein"> 15 days </option>
              <option value="Other"> Other </option>
            </select>
          </div>
          <button type="button" form="#infoform" class="btn btn-labeled btn-success" onclick="document.getElementById('#infoform').submit();">
         <span class="btn-label"><i class="far fa-paper-plane"></i>       </span>Publish</button>
        </div>
      </div>
      <div>
</form>